Metal extrusion press



Aug. 18, 1964 w. VOM DORP 3,144,937

METAL EXTRUSION PRESS Filed July 5, 1960 3 Sheets-Sheet 1 29 F/G/A XI //7 van/0r War/fer mm 0040 B Ms af/omeys Aug. 18, 1964 w. VOM DORP 3,144,937

METAL EXTRUSION PRESS Filed July 5, 1960 3 Sheets-Sheet 2 /m/e/7/0r War/fer l/om 00m By his afforneys MMM Aug. 18, 1964 w. VOM DORP METAL EXTRUSION PRESS 3 Sheets-Sheet 5 Filed July 5, 1960 //7 van/0r .l l/a/fer van? Dam By Ms af/omeys in ll/fill United States Patent 3,144,937 METAL EXTRUSEQN PRESS Walter vom Dorp, Rheydt, Germany, assignor to Marinesmann i /leer Aktiengesellschatt, lvionchen Gladbach,

Germany, a German cempariy Filed July 5, 1960, tier. No. 40,729 Ciaims priority application Germany July h, 1959 3 illainis. (til. 2t97-1l This invention relates to an extrusion press for metal rods and tubes in which the castings or extruded products are long and resistant to bending and there are a plurality of matrices arranged side by side. Each of these matrices are adapted to be moved between a side position and an extruding position in order to change the matrices and to separate the extruded product from its residual tail or flash and to get the dash out of the matrix. There is another device or station following the press where the products are subject to further treatment. The object of the invention is to produce an improved and simplified construction by which the castings can be fed to the device which carries out the next step in the process of manufacture.

It has heretofore been known to move one or more matrices and associated discharge channels in a straight line parallel to the extrusion axis from the side into and out of the extrusion position. While this arrangement has the advantage of carrying out many of the required incidental steps in a position other than the extrusion position itself, it has the disadvantage that the separation of the flash from the main casting must be carried out at the extrusion position of the apparatus. The only alternative heretofore known has been to increase th size of the flash. This was done by movement of the matrix itself and involved other aspects which were not advantageous.

This method required as part of the separation that the extruded casting be moved to the side position. Such a movement is advantageous only in the case of short castings where it is possible to get from the side position into a common conveying device for further working. It has been possible by these means to move blanks or castings of very small diameters, and even tubes of low Wall thickness with the flash still adhering to the matrix, into the separating position without important damage.

in the constantly growing requirement for an increased production from such extrusion presses, however, both with regard to the amount of production required and with regard to the diameter and Wall thicknesses of the product and especially where the extrusion press no longer produces a finished product but crude extrusions of 10 to 50 m. in length which are further worked or processed in other devices such as an associated reducing or Pilger rolling mill, the extruded products in the side position are too long, heavy and resistant to bending to permit them making a simple movement jointly with the matrix and then be passed along to a subsequent processing device.

According to the present invention these disadvantages are avoided by arranging the extruding and side positions of the press in the shape of a horizontal fan, i.e. spreading out fanwise from the following conveying or processing device and having the matrices and castings associated casting holders and discharge channels arranged to pivot as a unit about a point at the head of said next or following device singly or together.

This construction has important advantages. The casting is moved without any tensile, shearing or pressure stresses and by using long discharge channels the castings can be moved without any noticeable bending stresses from the extrusion position into one of the side or separating positions provided on each side of the extrusion position. Thus after separating the flash from the main casting, the latter is immediately passed on to the next device common to all the channels for further treatment. The construction also has the advantage that the auxilary devices in the side positions can be separated from the extrusion operation itself. This is advantageous because the extrusion forces, bending moments, etc. increasing progressively must be kept together as closely as possible to the extrusion axis. The greater accessibility in working space facilitates the maintenance and care of the apparatus during operation.

In the drawings FIG. 1 is a plan view of a press embodying the invention in which there are separating plungers beside the extrusion plunger.

FIG. 1A is a plan view similar to FIG. 1 but on a reduced scale showing by dotted lines the positions of the levers i, d, 8 and 8 when the channels '7 and 7' are in positions A and B respectively.

FIG. 3 is a view in longitudinal side elevation, partly broken away in section taken turned from FIG. 2, of the retracting mechanism of FIG. 2 taken on the line 3-3 of FIG. 2 with the left channel in line with the extrusion plunger.

In the embodiment shown in these drawings there is an extrusion cylinder and a plunger 1. There are extrusion d'es or matrices 5, 5 and a subsequent station or device 11 for treating the casting. This device may be related reducing or Pilger rolling mill or a conveying device or other desired apparatus. Referring to the diagrammatic embodiment of FIG. 1 there are two matrices shown, matrix 5' in the extrusion position A and located in a container or holder 3' and a matrix 5 in holder 3 beside it in side position B. Another side position B is shown, the two side positions being on opposite sides of the extrusion position A. It will be obvious that there can be additional side positions.

At each side position tools are shown. For example, in FIG. 1 of the drawings there are shown separating cylinders and plungers 2, 2'. The plunger 2 is at side position B and plunger 2' at side position B. These positions have to do with separation of the flash of each extruded product from the product 13 itself. The matrices 5 and 5 are mounted in holders 3 and 3' on the body 12 of the press. There are discharge channels 7 and 7' extending beyond the press body 12 toward the next device it in the production line. These channels '7' and 7 are shown lined up at the press with the positions B and A respectively. They converge fanwise in a horizontal plane at a point 0 where the head or beginning of the in line device 11 is located. There are horizontal guide rails it for the channels to move on.

In common with the holders 3, 3 and matrices 5 and 5' the discharge channels 7 and 7' pivot about the head point 0 in the course of the operation of the following device ll, moving from position B and A to A and B respectively. To make these movements there are, for example, holder drive means 4, 4 connected to the holders 3, 3'. For this purpose shafts 6, 6 synchronize levers S, 8 connected to the press ends of the channels 7, 7' with the holder drive means 4', 4. It is also possible in the alternative to connect the channels 7, 7' directly through the frame 12 to the containers 3, 3. .The holders 3, 3 move laterally between stationary channels 9. The distance from point 0 to the holders 3, 3' may be as much as 70 feet. it will be obvious that only the channels 7, 7 need necessarily be arranged in the shape of a fan. The holders 3, 3 need not necessarily be curved but face in a converging manner.

FIG. 1 shows the holder 3 with the matrix 5 and the discharge channel 7 in the operating position after the extrusion has taken place. Channel 7 and matrix 5 have just moved from the central position O-A to the side position O B. Product 13 is still connected with its flash en a es? in'the matrix 5. This flash will be removed by the separating plunger 2. The holder 3 is in position OA and contains a billet 14 ready to be forced out by the extrusion plunger 1. The matrices 5, 5' are backed up by pressure pieces 25, 25' and counter holding blocks 26, 26, the pressure pieces moving between B and A and B and A with the matrices but the counter holding blocks are not reciprocatory in this sense in the embodiment of FIG. 1.

The preferred embodiment shown in FIGS. 2 and 3 is dilferentiated from the simple embodiment of FIG. 1 in that the matrices 5, 5 together with their blocks 26 are slidably moved through an opening in the body 12 of the extrusion press into its receiver by driving mechanism and held in the receiver by means of radially movable, semi-circular ring segments or jaws 28, 28 carried by the body 12. In this way the usual separating plungers 2 are dispensed with.

The construction is as follows. The press has the same central work position OA and a side work position O-B, OB' on each side of the central position as in the embodiment of FIG. 1. There are tools associated with each side position swinging about the point including special separating plungers 112, 112 carried by the body 120 of the press as hereinafter referred to. Matrices 5, when in their operative position are located in the holders 113, 113 and the holders are movably disposed.

In FIG. 2 the extrusion plunger 1 is shown in the central or extrusion position OA. The following mechanism 11 (not shown) is located at the end 0 as in FIG. 1. The discharge channels 7 and '7 are moved about point 0 as in the previous construction but located between them and the matrices 5, 5 is the body 12th of the press. The body 120 does not oscillate about the point 0.

The oscillations of the discharge channels 7, 7 are given them by operating or drive means 118, 118' independent of the means to swing the matrices. In FIG. 2 these channel drive means are shown as pistons and cylinders, there being one piston and cylinder 118 for channel 7 and a separate piston and a cylinder 118 for channel 7'. The pistons of these drive means are attached to the ends 27, 27' of the channels. The channel 7 oscillates between position OA and position O-B while channel 7' oscillates between position OB and OA. Mounted on the sides of the stationary body 120 are the special ejecting plungers 112, 112', the plunger 112 being aligned with channel 7 when in the position OB and plunger 112' being aligned with channel 7' when the latter is in position O-B'. There is an opening through the middle of the body 120 from the channel side to the matrix side thereof and the driving means about to be described moves a matrix through this opening into its proper operating position in the holder 113 or holder 113'. It is brought forward into this position by one of two blocks 26". These blocks normally sit in recesses in the ends 27 and 27' respectively of the channels 7 and are carried forward into the receiver 113, 113 respectively by a tube 30. When the tube 30 has advanced the block 26 or 26, until the matrix 5 or 5' is in operating relation with the holder 113 or 113, it is held in this forward position by semi-circular ring segments 28 or 28' resting on the matrix face of the body 120. These ring segments are advanced into position to provide support for the block and retracted therefrom by operating cylinders 29 or 29 (see FIG. 2).

Since the only extrusion position in the example shown in the drawings is the position OA, it follows that there is only one tube 30. As shown in FIG. 2, this tube 3th is advanced and retracted by the following means. There is a motor 33 beside the channel 7' adapted to give rotation to a pinion 32 which engages the rear end of the tube and causes advancement or retraction of the latter. This advancement or retraction is transmitted from the pinion 32 to the tube 30 by rack teeth on tube 30. There is a lug 31 on the tube which engages block 26". In FIG. 2 it engages on block 26 while channel 7' is in position OA but in FIG. 3 channel 7 is in position OA and lug 31 engages the other block 25". As can be seen from FIG. 3, the channel face of the body is cut or notched in a manner to permit the channels to shift from one position to the other in their fan-shaped movement about point 0 in spite of the presence of the matrix 5 and block 26", or matrix 5 and block 26 projecting from the end 27 or 27 of channel 7 or 7'. There are conventional conveyor rollers 22 and 22 in the channels 7, 7' driven by motors 21, 21.

The arcuate or fan-shaped movement of the matrix holders 113, 113' from positions O-B' and OA, to OA and 0-3 respectively is provided by the independent drive means 114, 114 respectively. The holders slide on guides 119, 119' through the intermediary of castings as can be seen more particularly in FIG. 3. It will be noted the guides are independent from the press body. The operation of the parts 29, 29', 114, 114' and 118, 118' in proper synchronism with each other can be obtained by any desired control.

When the device is being operated, and assuming that channel '7 is in the extrusion position OA as shown in FIG. 2, the motor 33 operating through pinion 32 will cause the holding block 26 to be projected or advanced through the body 132') into its operating relation with the holder 113, there being a pressure piece 25 between the matrix 5 and holding block 26". Thereafter the semi-circular jaws or segments 28, 28' are forced in behind the block 26 by their driving means 29, 29. When the extrusion operation is complete, these drive means 29, 29 then retract the segments 28, 28 and the motor 33 withdraws the pressing tube 3t) from the advanced position shown in FIG. 2 until the matrix 5 is below the channel face of the body 12%, as shown, for example, in FIG. 3. The drive means 118, 118' then move the channels 7, 7' in their arcuate path until they are respectively in the positions OA and OB' and the drive means 114, 114' move the holders 113, 113' from the positions shown in FIG. 2 to positions OA and O-B' respectively as shown in FIG. 1A. By means of the separating plunger 112' on the side of the body 120 the flash is removed from the extruded product 13 while in the position OB' and the matrix is returned for renewed use via a cooling bath. When the extrusion of the product occurs in the channel 7, the extrusion plunger 112 will cause the removal of the flash.

I claim:

1. A metal extrusion press in line with a following device providing treatment of products subsequent to extrusion,

a base body in the press,

two containers movable relative to said body,

a matrix positioned in each container,

two discharge channels for the extruded products, said containers and channels each being swingable sideways between an extrusion position and one of two side positions adjacent the extrusion position, said side positions being for cutting off the extruded prod-. ucts from the residual stock,

characterized in that the channels are arranged fanwise, converging at a pivot point at the in-line following device, which device is common to all channels, said base body having a slot at the extrusion position and opposite which position the channel when receiving the extrusion product is located and means to swing the matrices and channels from the central extrusion position to a side position and back again; whereby long rigid products can be extruded through said slot, moved to a side posi tion, after which movement, and as the extruded product is cut off from the residual stock and conveyed to the next following device in line, another billet may be extruded into the other channel in the central position.

2. A metal extrusion press according to claim 1 in which there are guides for the pivoting movment of the matrix holders, said guides being separate from the base body.

3. A metal extrusion press according to claim 1 in which there are means for removal of flash from the casting, said means being provided on the side of the base body.

4. A metal extrusion press according to claim 1 characterized in that in each discharge channel there is a holding block associated with the base body having its matrix and the cast tube and flash thereon, and there being a space in each discharge channel constituting a space for the holding block.

5. A metal extrusion rod and tube casting press in line with a following device providing treatment of prod ucts subsequent to extrusion,

a base body in the press,

an extrusion ram, there being an extrusion position opposite the axis of the ram and a side position on either side thereof in a horizontal plane, two containers, a matrix positioned in each container, two discharge channels for the extruded products extending toward the in-line following device, each being movable sideways between an extrusion position and one of said two side positions adjacent the extrusion position, said side positions; being for charging the containers with new billets and cutting off the extruded products from the residual stock,

characterized in that the discharge channels converge at and pivot fanwise in a horizontal plane about the following device in line, and

means to pivot said matrices containers and channels between the extrusion and side positions; whereby long rigid products can be extruded and moved to a side position, after which movement, and as the extruded product is cut off from the residual stock and conveyed to the in-line following device, another billet may be extruded.

6. A continuous metal extrusion press according to claim 5 distinguished in that the pivoting means are connected to the discharge chanels.

7. A metal extrusion rod and tube casting press in line with a following device providing treatment of products subsequent to extrusion,

a base body in the press,

two containers movably mounted on the base body,

a matrix positioned in each container,

an extrusion ram, there being an extrusion position opposite the axis of the ram,

and side positions, one on either side of the extrusion position,

two discharge channels for the extruded products extending toward the in-line following device, each channel being pivotable sideways in a horizontal plane between an extrusion position the one of said two side positions, said latter positions being for cutting off the extruded product from the residual stock, exchanging matrices and charging the containers with the new billets,

characterized in that the discharge channels converge at and spread fanwise about the in-line following device,

means to pivot the matrices and containers, and

means to pivot the channels between extrusion and side position; whereby long rigid products can be extruded and moved to a side position and conveyed to the in-line following device while another billet may be extruded.

8. A metal extrusion rod and tube casting press in line with a following device providing treatment of products subsequent to extrusion,

a base body in the press, discharge channels for the extruded products extending toward the next following device,

two discharge containers movably mounted on the base body,

a matrix movable from extrusion to side position with the channels within each container,

the two containers for the extruded products extending toward the next device in line, each being pivotably swingable sideways between an extrusion position and a side position on either side thereof in a horizontal plane, said side positions being for cutting oif the extruded product from the residual stock, and the central position being for charging the containers with a new ingot, the containers converging at and pivoting fanwise in a horizontal plane about the following device in line,

means to pivot said containers and channels between the extrusion and side positions;

whereby long rigid products can be extruded, cut oif form the residual stock, and conveyed to the next following device.

References Cited in the file of this patent UNITED STATES PATENTS 1,664,976 Hantf Apr. 3, 1928 2,031,008 Schwerak Feb. 18, 1936 2,176,365 Skinner et al Oct. 17, 1939 2,352,960 Lorant July 4, 1944 2,880,867 Keck Apr. 7, 1959 FOREIGN PATENTS 1,163,770 France Apr. 28, 1958 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent N0. 3 14433? August 18 1964 Walter vom Dorp It is hereb certified that, error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2 after line l7 insert the following:

F160 2 is a plan view on an enlarged scale of the extrusion press proper of a preferred embodiment of the invention in which the matrix can be retracted from its holder by mechanism operating through the body of the press the right channel and container being shown in line with the extrusion plunger same column 2, line 12.6 before "related" insert a line 69, strike out "the'fl, second occurrence; column 5 line l for 'movment" read movement line 37 after "matrices" insert a comma; line 47 for "chanels" read channels column 6, line 10, strike out "theh Signed and sealed this 12th day of January 1965 (SEAL) Attest:

ERNEST W SWIDER EDWARD JO BRENNER Attesting Officer Commissioner of Patents 

1. A METAL EXTRUSION PRESS IN LINE WITH A FOLLOWING DEVICE PROVIDING TREATMENT OF PRODUCTS SUBSEQUENT TO EXTRUSION, A BASE BODY IN THE PRESS, TWO CONTAINERS MOVABLE RELATIVE TO SAID BODY, A MATRIX POSITIONED IN EACH CONTAINER, TWO DISCHARGE CHANNELS FOR THE EXTRUDED PRODUCTS, SAID CONTAINERS AND CHANNELS EACH BEING SWINGABLE SIDEWAYS BETWEEN AN EXTRUSION POSITION AND ONE OF TWO SIDE POSITIONS ADJACENT THE EXTRUSION POSITION, SAID SIDE POSITIONS BEING FOR CUTTING OFF THE EXTRUDED PRODUCTS FROM THE RESIDUAL STOCK, CHARACTERIZED IN THAT THE CHANNELS ARE ARRANGED FANWISE, CONVERGING AT A PIVOT POINT AT THE IN-LINE FOLLOWING DEVICE, WHICH DEVICE IS COMMON TO ALL CHANNELS, SAID BASE BODY HAVING A SLOT AT THE EXTRUSION POSITION AND OPPOSITE WHICH POSITION THE CHANNEL WHEN RECEIVING THE EXTRUSION PRODUCT IS LOCATED AND MEANS TO SWING THE MATRICES AND CHANNELS FROM THE CENTRAL EXTRUSION POSITION TO A SIDE POSITION AND BACK AGAIN; WHEREBY LONG RIGID PRODUCTS CAN BE EXTRUDED THROUGH SAID SLOT, MOVED TO A SIDE POSITION, AFTER WHICH MOVEMENT, AND AS THE EXTRUDED PRODUCT IS CUT OFF FROM THE RESIDUAL STOCK AND CONVEYED TO THE NEXT FOLLOWING DEVICE IN LINE, ANOTHER BILLET MAY BE EXTRUDED INTO THE OTHER CHANNEL IN THE CENTRAL POSITION. 